I pretty much use the Barry Bonds drill as my go to teaching. It just fixes almost everything reactively. I was always able to hit the ball far but I was always guessing and never back side. When I learned it as simple as swinging down but maintaining posture / spine angle then it really opened up the whole field to me and I was able to adjust on off speed.
We so over complicate this. It is actually pretty funny. Swing straight down to the ball and turn. Hands stay linear while posture \ turning provide the nike swoosh. If you are under the ball you are not down to enough and if you are pounding the ball in the ground you are not turning enough. Pretty simple.
Yep !! Try to keep the bat working " down to" aligned with the posture.